For the OSX Dashboard, I wrote a widget - Prowler - for sending quick links, phone numbers, and other notes to my phone. Includes event, message, and priority inputs (application string is hardcoded as "prowler"). It's also available on macupdate.com (just search for "prowler").

For After Effects, I modified a script posted in another forum to directly interface with prowl.pl, growlnotifiy, and/or a simple https request. I just recently posted version 1.4 on my site. Includes fully customisable settings for all Prowl variables (plus a few extras, like automated speech at the end of a render, in case I'm within earshot of the computer).

For Lightwave, DB&W Tools includes a scene plugin that sends Growl alerts on various states, such as render complete. Not exactly a direct Prowl interface (since it's really just a Growl plugin), but it works nicely!

I've created a Python script that listens using IMAP's IDLE mode and sends a Prowl notification to an iPhone every time a new Gmail message arrives. It is simple, well commented and well documented. The only requirement is OpenSSL installed on the computer that runs the script.

I've been working on a WebApp that will eventually be a one stop shop for your notification needs! Its pretty limited right now, but it will push twitter feeds, twitter trends and some shipping notifications (UPS and USPS) to the iPhone via Prowl. I'll build it out over time, but maybe some of you would enjoy it as-is.

Update (1/6/10) - I've made some stability improvements as well as added a few features, including much better support for Twitter. It's now using the Twitter Search API, so (most) anything you can search for (hash tags, location, to and from, mentions, etc) you can set up a prowl notification for.

Update (1/14/10) - I got tired of not having fine control over the notifications on the iPhone, so I added in priority controls. I've also tweaked the notifications a bit so each type (UPS and USPS Shipping, Twitter, and Twitter Trends) have unique Application names, so users can control redirects easily.

Update (1/20/10) - I've added in generic rss feeds to the notification types. Since Prowl doesn't render html code, the notification only includes the title of each feed item, but the notification includes a shortened (by bit.ly) link to the original article.

Ok. So definitely in beta for now, but still usable. I've done as much bug testing as I can, and should be up for a bit, as long as PokerNews doesn't ban me. (And as long as PokerNews is actually UP which it isn't right now...2 hours before the Casino Employee's event kicks off...)

It's pretty user-friendly and easy to understand. You can get updates for specified players, or just chip counts even (combine for specified players' chip counts). I don't send out emails, not even for registering. It's mostly there just to ensure your lost password gets recovered. Feel free to PM w/ any questions or the like.

The God process monitoring framework (http://god.rubyforge.org/) now support sending notifications to an iPhone through Prowl via my Prowly gem (http://github.com/rafmagana/prowly) . YAAY! Your server is using a lot of RAM, or it's running out of space?, you'll get the notification right on your iPhone.